call 非正式用词，含义广泛，指用说话或呼叫的形式召唤。
summon 正式用词，指官方或正式的召集，召集者具有权力或权威性。
send for 作“召唤”解时，语气较随便，暗示委派一件工作。
参考例句
1. I heard someone calling my name. 我听见有人喊我的名字。
2. Do you need to call your lawyer? 你需要打电话给你的律师吗？
3. Please call me if you have problems. 假如碰到问题，请给我打电话。
英英解释
n.
1. a telephone connection
2. a special disposition (as if from a divine source) to pursue a particular course
3. a loud utterance; often in protest or opposition
4. a demand especially in the phrase
5. the characteristic sound produced by a bird
6. a brief social visit
7. a demand by a broker that a customer deposit enough to bring his margin up to the minimum requiremen
8. a demand for a show of hands in a card game
9. a request
10. an instruction that interrupts the program being executed
11. a visit in an official or professional capacity
12. (sports) the decision made by an umpire or referee
13. the option to buy a given stock (or stock index or commodity future) at a given price before a given v.
1. assign a specified (usually proper) proper name to
2. get or try to get into communication (with someone) by telephone
3. ascribe a quality to or give a name of a common noun that reflects a quality
4. order, request, or command to come
5. utter a sudden loud cry
6. pay a brief visit
7. call a meeting; invite or command to meet
8. order or request or give a command for
9. order, summon, or request for a specific duty or activity, work, role
10. indicate a decision in regard to
11. stop or postpone because of adverse conditions, such as bad weather
12. read aloud to check for omissions or absentees
13. send a message or attempt to reach someone by radio, phone, etc.; make a signal to in order to trans
14. declare in the capacity of an umpire or referee
15. utter a characteristic note or cry
16. utter in a loud voice or announce
17. make a prediction about; tell in advance
18. challenge (somebody) to make good on a statement; charge with or censure for an offense
19. consider or regard as being
20. demand payment of (a loan)
21. give the calls (to the dancers) for a square dance
22. greet, as with a prescribed form, title, or name
23. make a stop in a harbour
24. make a demand, as for a card or a suit or a show of hands
25. require the presentation of for redemption before maturation
26. lure by imitating the characteristic call of an animal
27. challenge the sincerity or truthfulness of
28. rouse somebody from sleep with a call
